CN201162528Y - Expansible sand-prevention screening tube - Google Patents
Expansible sand-prevention screening tube Download PDFInfo
- Publication number
- CN201162528Y CN201162528Y CNU2008200189051U CN200820018905U CN201162528Y CN 201162528 Y CN201162528 Y CN 201162528Y CN U2008200189051 U CNU2008200189051 U CN U2008200189051U CN 200820018905 U CN200820018905 U CN 200820018905U CN 201162528 Y CN201162528 Y CN 201162528Y
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- Prior art keywords
- expansion
- expandable
- screen
- parent tube
- outer cover
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- Expired - Fee Related
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- 238000012216 screening Methods 0.000 title 1
- 239000004576 sand Substances 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 29
- 230000007704 transition Effects 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 4
- 238000002386 leaching Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000009954 braiding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 6
- 230000001681 protective effect Effects 0.000 abstract 3
- 239000003208 petroleum Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000003129 oil well Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 210000001145 finger joint Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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Abstract
The utility model provides an expandable sand prevention sieve vessel used in the field of sand prevention of petroleum completion well, consisting of an expandable base tube, a filter media and a metal protective cover. The expandable sand prevention sieve vessel is characterized in that slotted holes are evenly distributed in the expandable base tube in the radial direction; the expandable joints welded at the two ends of the expandable base tube are pre-expanded and connected by common screw threads; the filter media adopts a double filter screen structure, wherein, the filter media is wrapped by a metal protective cover which is welded with the expandable base tube; in the process of expansion, the slotted holes of the expandable base tube and the protective cover are opened and the metal filter screens are expanded through mutually sliding. The expandable sand prevention sieve vessel has the advantages that an overlapped slotted hole structure is adopted, and the both ends of the slotted holes adopt arc transition structure, which avoids stress concentration; the filter media adopts a double filter screen structure, which is expanded through sliding; the effect of sand prevention is not affected by the expansion process; the external wall of the sieve vessel can be tightly attached to the shaft lining after expansion, thus eliminating the circular space between the sieve vessel and the shaft lining and improving the sand prevention effect of the sieve vessel.
Description
Technical field
The utility model is applicable to fields such as oil drilling completion, sand control repairing, is a kind of expandable sand control screen pipe.
Background technology
China's loose sand oil accumulation distribution is wide, reserves are big, and output occupies an important position.Sand production is that loose sand oil accumulation is exploited ubiquitous problem, and the harm of shaking out mainly shows the following aspects: influence the oil well ordinary production, increase cost of production, destroy stratum, contaminated environment.
Traditional sand-preventing process is a cost with the sacrificial section production capacity mostly.Gravel pack completion easily produces depth-type filtration, causes screen casing to stop up, and influences output, and its implement complexity, expense are higher; Sand control techniques such as wire-wrapped screen, cutting seam sieve tube, metal wool screen casing, TBS screen casing successively occurred in the mechanical sand control field, there is following problem in these screen casings:
The one, when reservoir sand sorting difference, be difficult to form the oil flow channel of high permeability, out-of-date when the oil circulation, caused very big pressure to fall, increased oily stream flow resistance, limited oil well yield;
The 2nd, owing to there is the sand ring, during the screen casing fishing, easy stuck screen casing causes overhaul, increases task difficulty and cost.
Along with the arrival of oil field development middle and later periods, special well increases year by year, and the completion of horizontal well, multilateral well, sidetracked hole and sand control are comparatively difficult.Therefore researching and developing sand control installation and the technology that sand controlling result is good, operating cost is low has crucial technology and economic implications.
At present, the expansion sand control screen (ESS) of weatherford company development is promoted in the oil field abroad, and effect is better, but still have that well-completing process and equipment complexity, required expansion force are big, expansion and defectives such as thread connection place tension and anti-twisting property weakness.
Summary of the invention
Permanent plastic deformation radially can take place in expandable sand control screen pipe, the purpose of increase the screen casing internal diameter to reach, optimizing casing programme, thus significantly reduce sand control treatment expense few and oil well production cost and raising oil well productivity.The purpose of this utility model be provide a kind of to the scene and adopt regular screw threads to connect, be easy to expand, expandable sand control screen pipe that sand controlling result is good.
The utility model is to realize like this.A kind of expandable sand control screen pipe is made up of expansion parent tube, filter medium and metal coating outer cover three layer construction; the expansion parent tube is the body of inflatable screen casing; filter medium is between expansion parent tube and metal coating outer cover, and the metal coating outer cover is an expandable screen outermost layer structure.The expansion parent tube adopts stainless steel material, is evenly distributed with slot above, and the expansion pipe at expansion parent tube two ends is expanded in advance, adopts extraordinary welding procedure, is welded to connect with the expansion parent tube to be one; Filter medium adopts the double-layer leaching net structure, and the nexine screen cloth is worked out by overlapped regular sheet metal, and every thin slice one end is fixed on the expansion parent tube; overlap mutually between the thin slice; outer screen is fixed on the metal coating outer cover, adopts self-overlapping mode, is a monolithic construction.During expansion, the slot of expansion parent tube and protection outer cover is opened, and the flow region of exposing metal screen pack, metal filter screen are realized by sliding over each other expanding, and effectively pore size filter remains unchanged.
Advantage of the present utility model is:
(1) the utility model adopts the regular screw threads connecting mode, expansion pipe is expanded in advance, adopt extraordinary welding procedure, be welded to connect with parent tube and be one, expansion pipe place is no longer expanded when the expansion operation, so the screw thread connection strength height, mechanical performance is strong, overcomes weakness such as expansion screw tension and anti-twisting property weakness, processing technology complexity, cost height.
(2) axially the expansion parent tube is being carried out slot by the slot pattern of mutual overlap joint, finger place, slot two ends adopts the arc transition structure simultaneously, and the stress at slot finger place is concentrated when avoiding expanding, and is easy to expand, and reduces expansion force, reduces construction cost and risk.
(3) filter medium adopts the double-layer leaching net structure, and the nexine screen cloth is formed by overlapped sheet metal braiding, is fixed on the expansion parent tube, and outer screen is fixed on the metal coating outer cover, is a monolithic construction.During expansion, metal filter screen is realized by sliding over each other expanding, and effectively pore size filter remains unchanged, and sand controlling result is not subjected to the influence of expansion process.
(4) its outer wall of expansion back can be close to the borehole wall, has eliminated the annular space of the screen casing and the borehole wall, reduces the migration of the mobile and particulate of sand grains, can reduce sand impinging and erosion problem to greatest extent, increase the filter sand area, improve the screen sand control effect, prolong the screen sand control life-span;
(5) expandable screen has maximum boss ratio and stronger crooking ability; can be fit to various cased hole completion wells; and the bore hole well of borehole wall rule; be specially adapted to horizontal well, multilateral well, sidetracked hole, cross oil pipe, coiled tubing, repeat to remedy the sand control of sand control and slim hole well, reach protection oil-gas reservoir, improve the development effectiveness of production capacity and recovery ratio.
Description of drawings
1 one kinds of inflatable screen construction schematic diagrames of accompanying drawing, left side figure is an expansion parent tube slot distribution map, right figure is the expandable screen structure A-A sectional view before the screen expansion.
Inflatable screen casing schematic diagram before accompanying drawing 2 expands.
Inflatable screen casing schematic diagram after accompanying drawing 3 expands.
1 expansion parent tube, 2 filter mediums, 3 metal coating outer covers, 4 slots, 5 expansion pipes.
The specific embodiment
Now the utility model will be further described in conjunction with Figure of description.
As accompanying drawing 1, Fig. 2 and shown in Figure 3; the utility model is a kind of expandable sand control screen pipe; it is made up of expansion parent tube 1, filter medium 2 and metal coating outer cover 3 three layer constructions; expansion parent tube 1 is the body of inflatable screen casing; filter medium 2 is between expansion parent tube 1 and metal coating outer cover 3, and metal coating outer cover 3 is an expandable screen outermost layer structure.Axially evenly cut slot 4 at expansion parent tube 1, finger place, slot 4 two ends adopts the arc transition structure, and expansion parent tube 1 two ends are welded with expansion pipe 5; Filter medium 2 adopts the double-layer leaching net structure, and the nexine screen cloth is formed by overlapped regular sheet metal braiding, and every thin slice is fixed on the expansion parent tube 1 for one section, overlap mutually between the thin slice, outer screen is fixed on the metal coating outer cover 3, adopts self-overlapping mode, is a monolithic construction; Filter medium 2 outsides are surrounded by metal coating outer cover 3, are connected as a single entity by welding and expansion parent tube 1.
The expansion pipe 5 at expansion parent tube 1 two ends is expanded in advance, and the tapered bell mouth shape in back that expands, internal diameter adopt regular screw threads to connect greater than expansion parent tube 1 internal diameter between the expandable screen, improve the mechanical performance at thread connection place.Slot pattern by mutual overlap joint is axially being carried out slot to expansion parent tube 1, and the expansion pipe 5 after expanding in advance is slot not, and finger place, slot 4 two ends adopts the arc transition structure, and the stress at slot 4 finger places is concentrated when avoiding expanding, and reduces expansion force.
But under the pressure effect of reducing expansion cone, inflatable screen casing generation radial plastic deformation is realized the purpose that expands.During expansion, the slot of expansion parent tube 1 and metal coating outer cover 3 is opened, and exposes the flow region of filter medium 2, and metal filter screen is realized by sliding over each other expanding, and effectively pore size filter remains unchanged.
When expandable screen is expanded to expansion pipe 5 places of expanding in advance, release pressure variable compression footpath expansion cone, no longer expand during construction in expansion pipe 5 places, expansion cone is smoothly by after the expansion pipe 5, pressurization makes the expansion cone external diameter become big, continues to expand, until the screen casing tail end.Before the inflatable screen expansion, 1 body diameter of expansion parent tube is less than expansion pipe 5 external diameters, and after inflatable screen casing was realized expanding, 1 body diameter of expansion parent tube was close to the stratum greater than expansion pipe 5 external diameters, has eliminated the annular space of the screen casing and the borehole wall.
After the construction of expanding is finished, can increase the filter sand area, improve the screen sand control effect, prolong the screen sand control life-span, thereby reduce drillng operation expense and oil well production cost.
Claims (3)
1. expandable sand control screen pipe, it is made up of expansion parent tube [1], filter medium [2] and metal coating outer cover [3] three layer construction, it is characterized in that: axially evenly cut slot [4] at expansion parent tube [1], the arc transition structure is adopted at slot [4] two ends, there is expansion pipe [5] at expansion parent tube [1] two ends, be taper, expansion pipe [5] external diameter is greater than this body diameter of expandable screen; Filter medium [2] adopts the double-layer leaching net structure, the nexine screen cloth is formed by overlapped regular sheet metal braiding, and every thin slice is fixed on the expansion parent tube [1] for one section, overlaps mutually between the thin slice, outer screen is fixed on the metal coating outer cover [3], is a monolithic construction; Filter medium [2] outside is surrounded by metal coating outer cover [3], is connected as a single entity by welding and expansion parent tube [1].
2. a kind of inflatable screen casing as claimed in claim 1 is characterized in that: expansion parent tube [1] carries out slot by mutual overlap joint pattern, slot [5] not in the expansion pipe.
3. a kind of inflatable screen casing as claimed in claim 1; it is characterized in that: expansion parent tube [1] is the body of inflatable screen casing; filter medium [2] is positioned between expansion parent tube [1] and the metal coating outer cover [3], and metal coating outer cover [3] is an expandable screen outermost layer structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200189051U CN201162528Y (en) | 2008-03-13 | 2008-03-13 | Expansible sand-prevention screening tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200189051U CN201162528Y (en) | 2008-03-13 | 2008-03-13 | Expansible sand-prevention screening tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201162528Y true CN201162528Y (en) | 2008-12-10 |
Family
ID=40183466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200189051U Expired - Fee Related CN201162528Y (en) | 2008-03-13 | 2008-03-13 | Expansible sand-prevention screening tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201162528Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532378A (en) * | 2008-03-13 | 2009-09-16 | 中国石化集团胜利石油管理局钻井工艺研究院 | Expandable sand control screen pipe |
| CN103089194A (en) * | 2011-10-31 | 2013-05-08 | 中国石油化工股份有限公司 | Method for completing well by cementing top of expandable screen |
| WO2015176369A1 (en) * | 2014-05-23 | 2015-11-26 | Tianjin Top Cloud East Energy Technology Co., Ltd. | Expandable sand screen |
| CN106121594A (en) * | 2016-08-29 | 2016-11-16 | 中国石油集团渤海钻探工程有限公司 | Variable-diameter sand control screen pipe |
| CN107288586A (en) * | 2017-07-26 | 2017-10-24 | 左青山 | A kind of telescopic type sand control screen and method |
-
2008
- 2008-03-13 CN CNU2008200189051U patent/CN201162528Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532378A (en) * | 2008-03-13 | 2009-09-16 | 中国石化集团胜利石油管理局钻井工艺研究院 | Expandable sand control screen pipe |
| CN103089194A (en) * | 2011-10-31 | 2013-05-08 | 中国石油化工股份有限公司 | Method for completing well by cementing top of expandable screen |
| WO2015176369A1 (en) * | 2014-05-23 | 2015-11-26 | Tianjin Top Cloud East Energy Technology Co., Ltd. | Expandable sand screen |
| CN106121594A (en) * | 2016-08-29 | 2016-11-16 | 中国石油集团渤海钻探工程有限公司 | Variable-diameter sand control screen pipe |
| CN106121594B (en) * | 2016-08-29 | 2018-09-07 | 中国石油集团渤海钻探工程有限公司 | Variable-diameter sand control screen pipe |
| CN107288586A (en) * | 2017-07-26 | 2017-10-24 | 左青山 | A kind of telescopic type sand control screen and method |
| CN107288586B (en) * | 2017-07-26 | 2023-07-07 | 胜利油田康贝石油工程装备有限公司 | Retractable sand control screen pipe and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081210 Termination date: 20110313 |